From: Andrey Zhadchenko <andrey.zhadche...@virtuozzo.com> Create new flush pio when we see REQ_PREFLUSH flag. Call original pio after the flush is done.
https://virtuozzo.atlassian.net/browse/VSTOR-91817 Signed-off-by: Andrey Zhadchenko <andrey.zhadche...@virtuozzo.com> --- drivers/md/dm-ploop-map.c | 41 +++++++++++++++++++++++++++++++++------ 1 file changed, 35 insertions(+), 6 deletions(-) diff --git a/drivers/md/dm-ploop-map.c b/drivers/md/dm-ploop-map.c index 8b72b5680a2b..6f0adcd392cf 100644 --- a/drivers/md/dm-ploop-map.c +++ b/drivers/md/dm-ploop-map.c @@ -1972,33 +1972,62 @@ int ploop_worker(void *data) } +static void ploop_preflush_endio(struct pio *pio, void *orig_pio_ptr, + blk_status_t bi_status) +{ + struct pio *original = orig_pio_ptr; + + if (bi_status) { + original->bi_status = bi_status; + ploop_pio_endio(original); + } else { + ploop_dispatch_pios(pio->ploop, original, NULL); + } +} + static void ploop_prepare_flush(struct ploop *ploop, struct pio *pio) { + struct pio *flush_pio = pio; struct md_page *md, *n; int md_inflight = 0; + if (pio->bi_op & REQ_PREFLUSH && (pio->bi_op & REQ_OP_MASK) != REQ_OP_FLUSH) { + flush_pio = ploop_alloc_pio(ploop, GFP_NOIO); + if (!flush_pio) { + pio->bi_status = BLK_STS_RESOURCE; + ploop_pio_endio(pio); + return; + } + + ploop_init_pio(ploop, REQ_OP_FLUSH, flush_pio); + flush_pio->endio_cb = ploop_preflush_endio; + flush_pio->endio_cb_data = pio; + flush_pio->queue_list_id = PLOOP_LIST_FLUSH; + flush_pio->free_on_endio = true; + } + write_lock_irq(&ploop->bat_rwlock); list_for_each_entry(md, &ploop->wb_batch_list_prio, wb_link) { md_inflight++; - md->piwb->flush_pio = pio; + md->piwb->flush_pio = flush_pio; } list_for_each_entry_safe(md, n, &ploop->wb_batch_list, wb_link) { md_inflight++; - md->piwb->flush_pio = pio; + md->piwb->flush_pio = flush_pio; list_del(&md->wb_link); list_add_tail(&md->wb_link, &ploop->wb_batch_list_prio); } - atomic_set(&pio->md_inflight, md_inflight); + atomic_set(&flush_pio->md_inflight, md_inflight); write_unlock_irq(&ploop->bat_rwlock); if (md_inflight) - queue_work(ploop->wq, &ploop->worker); + ploop_schedule_work(ploop); else - ploop_dispatch_pios(ploop, pio, NULL); + ploop_dispatch_pios(ploop, flush_pio, NULL); } static void ploop_submit_embedded_pio(struct ploop *ploop, struct pio *pio) @@ -2026,7 +2055,7 @@ static void ploop_submit_embedded_pio(struct ploop *ploop, struct pio *pio) ploop_inc_nr_inflight(ploop, pio); - if ((pio->bi_op & REQ_OP_MASK) == REQ_OP_FLUSH) { + if ((pio->bi_op & REQ_OP_MASK) == REQ_OP_FLUSH || pio->bi_op & REQ_PREFLUSH) { ploop_prepare_flush(ploop, pio); return; } -- 2.43.0 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
